NEED HELP: How to remove upstream O2 sensor plastic connector on a 2001 Protege 1.6L?

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mazda protege
Does anyone have any idea how to disconnect the upstream O2 sensor plastic connector on a 2001 Protege with a 1.6 L engine? It has a small clip that pulls up but the connector doesn't seem to want to pull free. It has to be something simple. Any suggestions would be appreciated!
 

Natey

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A small flat head screwdriver might help hold the button down ;) while you pull. It takes some patience and a little muscle. I know i don't need to say this, but make sure the car's cool, and don't pull on the wires!. Only the gray plastic connector.
 
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